From: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> Add pmbus probing driver for the adm1266 Cascadable Super Sequencer with Margin Control and Fault Recording. Driver is using the pmbus_core, creating sysfs files under hwmon for inputs: vh1->vh4 and vp1->vp13. Signed-off-by: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> --- Documentation/hwmon/adm1266.rst | 37 +++++++++++++++++++ Documentation/hwmon/index.rst | 1 + drivers/hwmon/pmbus/Kconfig | 9 +++++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/adm1266.c | 65 +++++++++++++++++++++++++++++++++ 5 files changed, 113 insertions(+) create mode 100644 Documentation/hwmon/adm1266.rst create mode 100644 drivers/hwmon/pmbus/adm1266.c diff --git a/Documentation/hwmon/adm1266.rst b/Documentation/hwmon/adm1266.rst new file mode 100644 index 000000000000..9257f8a48650 --- /dev/null +++ b/Documentation/hwmon/adm1266.rst @@ -0,0 +1,37 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver adm1266 +===================== + +Supported chips: + * Analog Devices ADM1266 + Prefix: 'adm1266' + Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1266.pdf + +Author: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> + + +Description +----------- + +This driver supports hardware monitoring for Analog Devices ADM1266 sequencer. + +ADM1266 is a sequencer that features voltage readback from 17 channels via an +integrated 12 bit SAR ADC, accessed using a PMBus interface. + +The driver is a client driver to the core PMBus driver. Please see +Documentation/hwmon/pmbus for details on PMBus client drivers. + + +Sysfs entries +------------- + +The following attributes are supported. Limits are read-write, history reset +attributes are write-only, all other attributes are read-only. + +inX_label "voutx" +inX_input Measured voltage. +inX_min Minimum Voltage. +inX_max Maximum voltage. +inX_min_alarm Voltage low alarm. +inX_max_alarm Voltage high alarm. diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 55ff4b7c5349..056f7107d7b8 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -30,6 +30,7 @@ Hardware Monitoring Kernel Drivers adm1026 adm1031 adm1177 + adm1266 adm1275 adm9240 ads7828 diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index a337195b1c39..da34083e1ffd 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -26,6 +26,15 @@ config SENSORS_PMBUS This driver can also be built as a module. If so, the module will be called pmbus. +config SENSORS_ADM1266 + tristate "Analog Devices ADM1266 Sequencer" + help + If you say yes here you get hardware monitoring support for Analog + Devices ADM1266 Cascadable Super Sequencer. + + This driver can also be built as a module. If so, the module will + be called adm1266. + config SENSORS_ADM1275 tristate "Analog Devices ADM1275 and compatibles" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index c4b15db996ad..da41d22be1c9 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_PMBUS) += pmbus_core.o obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o +obj-$(CONFIG_SENSORS_ADM1266) += adm1266.o obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o diff --git a/drivers/hwmon/pmbus/adm1266.c b/drivers/hwmon/pmbus/adm1266.c new file mode 100644 index 000000000000..79e8d90886b8 --- /dev/null +++ b/drivers/hwmon/pmbus/adm1266.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADM1266 - Cascadable Super Sequencer with Margin + * Control and Fault Recording + * + * Copyright 2020 Analog Devices Inc. + */ + +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include "pmbus.h" +#include <linux/slab.h> + +struct adm1266_data { + struct pmbus_driver_info info; + struct i2c_client *client; +}; + +static int adm1266_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct adm1266_data *data; + int i; + + data = devm_kzalloc(&client->dev, sizeof(struct adm1266_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + data->info.pages = 17; + data->info.format[PSC_VOLTAGE_OUT] = linear; + for (i = 0; i < data->info.pages; i++) + data->info.func[i] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + + return pmbus_do_probe(client, id, &data->info); +} + +static const struct of_device_id adm1266_of_match[] = { + { .compatible = "adi,adm1266" }, + { } +}; +MODULE_DEVICE_TABLE(of, adm1266_of_match); + +static const struct i2c_device_id adm1266_id[] = { + { "adm1266", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adm1266_id); + +static struct i2c_driver adm1266_driver = { + .driver = { + .name = "adm1266", + .of_match_table = adm1266_of_match, + }, + .probe = adm1266_probe, + .remove = pmbus_do_remove, + .id_table = adm1266_id, +}; + +module_i2c_driver(adm1266_driver); + +MODULE_AUTHOR("Alexandru Tachici <alexandru.tachici@xxxxxxxxxx>"); +MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1266"); +MODULE_LICENSE("GPL v2"); -- 2.20.1
